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Finding the Fourth Proportional to 397,588.50, 548,672.13 and 218,740.50

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Solution

The fourth proportional to 397,588.50, 548,672.13 and 218,740.50 is: 301,861.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,588.50 : 548,672.13 = 218,740.50 : x
  2. Step 2: Convert to fraction form
    397,588.50/548,672.13 = 218,740.50/x
  3. Step 3: Cross multiply
    397,588.50x = 548,672.13 × 218,740.50
  4. Step 4: Simplify right side
    397,588.50x = 120,016,816,052.27
  5. Step 5: Solve for x
    x = 120,016,816,052.27/397,588.50
  6. Step 6: Final answer
    x = 301,861.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.